2003/06/16 08:44:09

[org.ibex.core.git] / src / org / xwt / js / JS.java

diff --git a/src/org/xwt/js/JS.java b/src/org/xwt/js/JS.java
index c7c1c54..24f133a 100644 (file)
--- a/src/org/xwt/js/JS.java
+++ b/src/org/xwt/js/JS.java
@@ -15,6 +15,7 @@ import java.util.*;
  */
 public abstract class JS { 
 
+
     // Public Helper Methods //////////////////////////////////////////////////////////////////////
 
     /** parse and compile a function */
@@ -66,6 +67,7 @@ public abstract class JS {
         private boolean sealed = false;
         public Obj() { this(false); }
         public Obj(boolean sealed) { this.sealed = sealed; }
+        /** a sealed object cannot have its properties modified */
         public void setSeal(boolean sealed) { this.sealed = sealed; }
         public Object get(Object key) { return entries.get(key); }
         public void put(Object key, Object val) { if (!sealed) entries.put(key, val); }
@@ -96,7 +98,7 @@ public abstract class JS {
     public static class Scope extends ScopeImpl { 
         public Scope(Scope parentScope) { this(parentScope, false); }
         public Scope(Scope parentScope, boolean sealed) { super(parentScope, sealed); }
-        public Scope getParentScope() { return super.getParentScope(); }
+        /** transparent scopes are not returned by THIS */
         public boolean isTransparent() { return super.isTransparent(); }
         public boolean has(Object key) { return super.has(key); }
         public void declare(String s) { super.declare(s); }
@@ -114,7 +116,44 @@ public abstract class JS {
             super(sourceName, firstLine, sourceCode, scope);
         }
     }
+
+    public static final JS Math = new org.xwt.js.Math();
  
+    /** encapsulates a single JavaScript thread; the JS.Thread->java.lang.Thread mapping is 1:1 */
+    public static class Thread {
+
+        CompiledFunction currentCompiledFunction = null;
+        Vec stack = new Vec();
+        private int line = -1;
+
+        /** binds this thread to the current Java Thread */
+        public void bindToCurrentJavaThread() { javaThreadToJSThread.put(java.lang.Thread.currentThread(), this); }
+
+        /** returns the line of code that is currently executing */
+        public int getLine() { return line; }
+
+        /** returns the name of the source code file which declared the currently executing function */
+        public String getSourceName() { return currentCompiledFunction == null ? null : currentCompiledFunction.getSourceName();  }
+
+        /** fetches the currently-executing javascript function */
+        public JS.CompiledFunction getCurrentCompiledFunction() { return currentCompiledFunction; }
+
+
+        // Statics ///////////////////////////////////////////////////////////////////////
+
+        private static Hashtable javaThreadToJSThread = new Hashtable();
+
+        /** returns the JS thread for a given Java thread, creating one if necessary */
+        public static JS.Thread fromJavaThread(java.lang.Thread t) {
+            JS.Thread ret = (JS.Thread)javaThreadToJSThread.get(t);
+            if (ret == null) {
+                ret = new JS.Thread();
+                ret.bindToCurrentJavaThread();
+            }
+            return ret;
+        }
+        
+    }
 }